15.32 Transaction history and a thank you.
Refer to the previous exercise. The numbers of subjects in each cell were not equal, so the researchers used linear regression to analyze the data. This was done by creating an indicator variable for each factor and the interaction. Here is a partial ANOVA table. Complete it and state your conclusions regarding the main effects and interaction described in the previous exercise.
Source | DF | SS | MS | -value | |
Transaction history | 61.445 | ||||
Thank you | 21.810 | ||||
Interaction | 15.404 | ||||
Error | 160 | 759.904 |